Scroll vacuum pumps contain both a fixed and an Scroll Vacuum Pump orbiting scroll. As the orbiting scroll movements, voids are created at the inlet of the pump, drawing in the gas. As the rotor additional moves, the gas is steadily compressed until it really is discharged to atmosphere at the pump exhaust.
The scroll pump design provides 100% oil-free operation as it does not require any lubrication. The bearings are separated from the compression chamber so no contamination of the 
pumped gas can be done. In addition, the leak-tight design aids in preventing contamination of the pumped gas by ambient air flow. Maintenance is bound to changing the scroll suggestion seals which may be quickly done by the operator and without the need for special tools.